Centrifugal casting machine



Nov. 9 1926.

L. CAMMEN CENTRIFUG'AL CASTING MACHINE Filed April 14, 1926 ///////AA/ fwa avw'emtoz 4 Patented Nova 9, 1926.

LEON CAMMEN, OF NEW YORK, N. Y.

CENTRIFUGAL CASTING MAGHINE.

Application filed April 14, 1926. Serial No. 102,047.

The present invention refers to molds for centrifugal casting machines, and more specifically machines which cast not tubes, but

a number of separate castings, such as in-- gots, bars, slabs and the like. In such machines the problem of removing the cast bars from the machine is an important one. The

present invention sets forth means for doing this expeditiously.

In the illustrations,

Fig. 1 is a section of the mold in a plane normal to the axis of rotation;

Fig. 2 is a view, looking from on top, of the element indicated in Fig. l as 4; Fig. 3 is a section through one of the rollers 4 in Fig. 2. I

If the mold consisted merely of the barrel 1 and dividing bars 2, the castings 3 would lie in the position shown in Fig. 1 as long as the mold is spinning, the centrifugal force 7 holding them against the wall of the barrel.

As soon however as the speed of spinning decreased below a certain level, the barswhich happened at that time to be in the top part of the mold, not held any more by centrifugal force, would come down and. pile up in a heap. v This, besides marring the surface of the mold, would also make it very diflicult to remove the cast bars from the mold by any kind of a-mechanical device, as the cast bars would be piled up indiscriminately, and a mechanically operated grabbing device would have difliculty in getting a full hold on a bar. Because of this, it becomes necessary to provide some means by which the bar would clear away from the mold in the upper part of the latter, to enable the jaws of a grabbing device to get a good hold on the bar, and yet the cast bar would not fall all the way down, but would stay at a predetermined distance from the mold.

The present inventor solved this problem in his U. S. Patent No.'1,553,136 by provid ing the dividing bars 2 with shoulders. The

' present invention is a modification and further improvement of the device there shown. If the shoulders of the bars shown in the patent above were extended until they met, a construction would be obtained substantially like the one shown in Fig. 1. Fig. 1 per mits however to introduce the improvement shown in Fig. 2. In this the piece 4 is replaced by a roller bed of .the type familiar to rolling mill designers, and consisting of frame bars 6 and 7 which are shown. here as attached to the dividingbars 2 by means of pins or bolts .52, and rollers 4 with their pins 8. The purpose of this is to reduce the amount of power necessary to pull the bars out of the mold, and to permit to pull them faster.

The pieces 4 are merely intended to provide supports for the cast bars 3, and to prevent them from falling out of the mold when the latter stops spinning. It is therefore entirely immaterial (except from other considerations, such as questions of heat dissipation) whether the pieces 4 are made of solid plate from end to end or perforated, or made up of strips place at some intervals. It is likewise immaterial whether the pieces 4 are individual, or formpart of a cage running all around the mold.

Furthermore, while in Fi 1 the pieces 4 are shown attached to the dividing bars 2 by pins or bolts 52, it should be clearl understood that this is merely a .preferre construction, recommended because it is simple and can be made very rugged. Other constructions may however be adopted with the present invention, where the added cost and complications are not considered objectionable. Thus the cage consisting of'the pieces 4 may be held on some kind of a spider, possibly attached to moldbarrel 1, and spinning with it, but outside of the barrel proper, and may be slid into it at the proper time, e. g. when the bars are ready for pulling. This is however obviously merely a modification of the construction shown in Fig. l, and actually becomes the construction shown inFig. 1 at the time when this construction is useful. The means to slide the cage into and out of the barrel of the moldare not shown, as they are very simple and of such a character that any engineer who has realized the purpose of said means, will have no difliculty to design them to suit his particular conditions.

I claim:

1. A mold for centrifugal casting having partition lugs, and means external to the lugs and positioned within the mold to retain in spaced relation to thewall of the antifriction means upon said castings support means to facilitate Withdrawal of the castings.

3. A mold for centrifugal casting having 5 partition lugs, and means external to the lugs to retain in spaced relation to the wall of the mold castingsnot held thereto by gravity, said casting support means being axially insertable and removable with respect to the mold.

Signed at New.York, in the county and tate of New York, April 13, 1926.

LEON OAMMEN. 

